I am suspecting that the error has something to do with my directory name having a space in the name. "PS600 Firmware"? If this directory structure is put in the path, is it possible that the error happen with the improper PATH formation?

No, I have not tried to rename the folder. I am worried it may cause other problems and I have numerous other applications in the same directory that work fine. This is the first occurrence of this problem that I can tell.